<template>
  <div class="login_container">
    <div class="login_box">
        <!-- 头像 -->
        <div class="avator_box">
            <img src="../assets/logo.png" alt="">
        </div>
        <!-- 表单 -->
        <el-form ref="loginFormRef"
        class="login_form" 
        label-width="0px" 
        :model="loginForm"
        :rules="loginFormRules"
        >
            <!-- 用户名 -->
            <el-form-item prop="username">
                <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
            </el-form-item>
            <!-- 密码 -->
            <el-form-item prop="password">
                <el-input prefix-icon="el-icon-lock" 
                v-model="loginForm.password"
                type="password"></el-input>
            </el-form-item>
            <!-- 按钮区 -->
            <el-form-item class="btns">
              <el-button type="primary" @click="login">登录</el-button>
              <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
  </div>
</template>

<script>
export default {
    name:'Login',
    data() {
        return {
            //表单数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            //验证属性
            loginFormRules:{
                username:[
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                password:[
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }

        }
    },
    methods: {
        resetLoginForm(){
            this.$refs.loginFormRef.resetFields()
        },
        login(){
            this.$refs.loginFormRef.validate( async valid=>{
                if(!valid) return;
                const {data:res}=await this.$http.post('login',this.loginForm)
                if(res.meta.status !== 200) return this.$message.error('登录失败')
                this.$message.success('登录成功')
                // 登录成功后将token保存到客户端的sessionStorage中
                //跳转到后台主页，路由地址是HOME
                window.sessionStorage.setItem('token',res.data.token)
                this.$router.push('/home')
            })
        }
    },
}
</script>

<style lang='less' scoped>
.login_container{
    height: 100%;
    background-color: #2b4b6b;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: white;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%)
}
.avator_box{
    height:130px;
    width:130px;
    border:1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: rgb(160, 159, 159);
    }
}
.btns{
    display: flex;
    justify-content: flex-end;
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

</style>
